Question Detail

CHM 101 Chemical Thermodynamics Objective Question
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Question

Between 1 mol Pb(s) at 25°C and 1 mol Pb(l) at 800°C, which has higher entropy and why?
Options
A Pb(s) at 25°C has higher entropy because solids are more ordered
B Pb(s) at 25°C has higher entropy because it is at lower temperature
C Pb(l) at 800°C has higher entropy because it is a liquid at much higher temperature, with atoms able to translate and rearrange, and greater kinetic energy
Correct Answer
D Both have equal entropy
Correct Answer

Option C is the correct answer.

Detailed Explanation

Pb(l) at 800°C has higher entropy. Entropy increases with phase change (solid → liquid) and increasing temperature. Both factors strongly favor higher entropy for liquid Pb at 800°C.

Hint

The notes provide this comparison.

Question Info

Course: CHM 101
Topic: Chemical Thermodynamics
Type: Objective
Difficulty: Not specified
Question 969 of 1872
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